Mexico · 1991–2020

Best time to visit
San Juan.

December leads for comfortable weather in San Juan: typically 23.2°C by day, 3.9°C at night, with 6 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high23.2°C

Typical low3.9°C

Rain in December6 mm

Comfort

December

December · January · November

78climate match

Beach

October

October · July · June

70climate match

Outdoors

December

December · January · November

80climate match

The weakest month is July, scoring 52 against December’s 78 — days average 34.1°C, 10° above the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

7623.2° / 3.2°

Feb

7426.4° / 5.1°

Mar

6929.9° / 8.3°

Apr

6333.1° / 11.1°

May

5936.1° / 15.5°

Jun

5336° / 17.4°

Jul

5234.1° / 18.3°

Aug

5533.8° / 17.1°

Sep

6432° / 15.2°

Oct

7430° / 11.3°

Nov

7627° / 7.1°

Dec

7823.2° / 3.9°

Monthly climate evidence for San Juan — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	23.2°C	3.2°C	9 mm	1.3	10 h 43	76	Good coverage
February	26.4°C	5.1°C	3 mm	0.3	11 h 16	74	Good coverage
March	29.9°C	8.3°C	5 mm	0.9	11 h 56	69	Good coverage
April	33.1°C	11.1°C	6 mm	0.8	12 h 43	63	Good coverage
May	36.1°C	15.5°C	13 mm	1.4	13 h 22	59	Good coverage
June	36°C	17.4°C	47 mm	4.8	13 h 43	53	Good coverage
July	34.1°C	18.3°C	72 mm	7	13 h 35	52	Good coverage
August	33.8°C	17.1°C	74 mm	7.1	13 h 01	55	Good coverage
September	32°C	15.2°C	80 mm	5.9	12 h 16	64	Good coverage
October	30°C	11.3°C	26 mm	3.1	11 h 31	74	Good coverage
November	27°C	7.1°C	9 mm	1.4	10 h 52	76	Good coverage
December	23.2°C	3.9°C	6 mm	0.9	10 h 34	78	Good coverage

Records at SAN LUIS DEL CORDERO (DGE), 1976–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	36.7°C31 Jan 1996	-8.3°C4 Jan 1985	31 mm30 Jan 1984	74 mm1992 · driest 0 mm in 1986	35
February	37.8°C24 Feb 1997	-12.2°C4 Feb 2011	21 mm25 Feb 2005	22 mm2005 · driest 0 mm in 1994	35
March	38.9°C4 Mar 1991	-2.2°C21 Mar 1986	17 mm11 Mar 1997	37 mm2004 · driest 0 mm in 2012	32
April	41.7°C29 Apr 2002	-1.7°C5 Apr 1977	28 mm8 Apr 1985	49 mm2004 · driest 0 mm in 2005	34
May	45.0°C24 May 1989	5.6°C9 May 1977	47 mm10 May 1997	85 mm2009 · driest 0 mm in 1991	34
June	45.0°C7 Jun 1990	3.9°C7 Jun 2003	50 mm25 Jun 1985	132 mm1999 · driest 0 mm in 2011	35
July	42.8°C1 Jul 1992	6.7°C1 Jul 1985	75 mm24 Jul 1988	213 mm2012 · driest 0 mm in 1993	34
August	40.6°C3 Aug 1996	8.9°C31 Aug 1987	61 mm10 Aug 2002	288 mm2002 · driest 0 mm in 1986	34
September	40.0°C10 Sep 1999	6.7°C28 Sep 1989	80 mm26 Sep 2010	257 mm2008 · driest 2 mm in 1999	33
October	40.0°C5 Oct 1999	0.0°C30 Oct 2009	32 mm11 Oct 1981	94 mm1981 · driest 0 mm in 1982	35
November	38.9°C7 Nov 2002	-5.0°C28 Nov 2011	41 mm12 Nov 1991	50 mm1991 · driest 0 mm in 2009	32
December	38.9°C5 Dec 1995	-10.0°C12 Dec 1997	40 mm9 Dec 1991	59 mm1991 · driest 0 mm in 1980	33

Typical days per month at SAN LUIS DEL CORDERO (DGE), 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	13	2	5	<1
February	20	7	2	<1
March	27	19	<1	<1
April	29	26	0	<1
May	30	29	0	<1
June	29	28	0	2
July	29	26	0	2
August	30	27	0	3
September	29	23	0	2
October	28	19	<1	1
November	22	10	1	<1
December	14	2	5	<1

How often, not how much — every day in SAN LUIS DEL CORDERO (DGE)’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	79%	5%	<1%	4%	19.1–25.9°C
February	93%	2%	<1%	0%	22.7–28.3°C
March	97%	2%	<1%	<1%	27.1–32.2°C
April	97%	3%	<1%	1%	30.4–35.3°C
May	95%	5%	1%	5%	33.9–39.1°C
June	84%	16%	5%	19%	32.8–39.4°C
July	79%	22%	8%	25%	30.1–37.1°C
August	77%	23%	8%	27%	31.6–36.2°C
September	81%	19%	7%	17%	29.7–35.0°C
October	89%	11%	4%	6%	27.7–32.4°C
November	90%	4%	<1%	3%	24.9–29.6°C
December	81%	4%	<1%	2%	20.4–26.1°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1977Each stripe is one year’s mean temperature against the 25-year average. Warmest: 1995. Coolest: 1984.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3978631
NOAA station: MXN00010132 · SAN LUIS DEL CORDERO (DGE)
Station distance: 6.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 25.40°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from SAN LUIS DEL CORDERO (DGE) is what differs

San Luis del Cordero→La Purísima→Los Ángeles→Las Cuevas→Rancho Nuevo→Santa Ana→

Or put two places side by side: San Juan vs San Luis del Cordero

Best time to visitSan Juan.

December

October

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Juan.

The whole year,
without the guesswork.

Nearby, measured,
and named.